GB/T 8162-2008 (Seamless steel pipes for structural use)
Mainly used for general structures and mechanical structures. Its representative materials (grades): carbon steel No. 20, No. 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
GB/T 8162-2008 (
Seamless steel pipes for structural use)
Mainly used for general structures and mechanical structures. Its representative materials (grades): carbon steel No. 20, No. 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
GB/T 8163-2008 (seamless steel pipe for transporting fluids)
Mainly used for conveying fluid pipelines in engineering and large-scale equipment. Representative materials (grades) are 20, Q345, etc.
GB/T 5310-2008 (seamless steel pipes for high-pressure boilers)
It is mainly used for high temperature and high pressure resistant fluid transport headers and pipelines in power plants and nuclear power plant boilers. Representative materials are 20G, 12Cr1MoVG, 15CrMoG, etc.
GB/T 5312-2009 (carbon steel and carbon-manganese steel seamless steel pipes for ships)
Mainly used for Class I and II pressure-resistant tubes for ship boilers and superheaters. Representative materials are 360, 410, 460 steel grades, etc.
GB/T 6479-2013 (Seamless steel pipe for high-pressure fertilizer equipment)
Mainly used in fertilizer equipment to transport high temperature and high pressure fluid pipelines. Representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo, etc.
GB/T 9948-2013 (Seamless steel pipe for petroleum cracking)
Mainly used in boilers, heat exchangers and pipelines for transporting fluids in petroleum refineries. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.
GB/T18248-2008 (Seamless steel pipe for gas cylinders)
Mainly used to make various gas and hydraulic cylinders. Its representative materials are 37Mn, 34Mn2V, 35CrMo, etc.
GB/T 17396-2009 (Hot-rolled seamless steel pipe for hydraulic props)
It is mainly used to make hydraulic supports, cylinders and columns in coal mines, as well as other hydraulic cylinders and columns. Its representative materials are 20, 45, 27SiMn, etc.
GB/T 3639-2009 (cold drawn or cold rolled precision seamless steel pipe)
It is mainly used for steel pipes used in mechanical structures and carbon pressing equipment that require high dimensional accuracy and good surface finish. Its representative materials include 20, 45 steel, etc.
GB/T 8713-1988 (Precision inner diameter seamless steel pipe for hydraulic and pneumatic cylinders)
It is mainly used to produce cold-drawn or cold-rolled seamless steel pipes with precise inner diameters for hydraulic and pneumatic cylinders. Its representative materials are 20, 45 steel, etc.
GB/T 13296-2013 (Stainless steel seamless steel pipes for boilers and heat exchangers)
Mainly used in boilers, superheaters, heat exchangers, condensers, catalytic tubes, etc. in chemical enterprises. High temperature, high pressure and corrosion resistant steel pipes are used. Its representative materials are 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2T, etc.
YB-T 5035-2010 (seamless steel pipe for automobile half shaft sleeve)
It is mainly used to make high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipes for automobile axle sleeves and drive axle housing shaft tubes. Its representative materials are 45, 45Mn2, 40Cr, 20CrNi3A, etc.
API SPEC5CT-1999 (Casing and Tubing Specification)
It is compiled and published by the American Petroleum Institute (American Petroleum Institute, referred to as "API") and is used throughout the world. Among them: casing: a pipe that extends from the ground surface into the well and serves as the well wall lining. The pipes are connected by couplings. The main materials are steel grades such as J55, N80, and P110, as well as steel grades such as C90 and T95 that are resistant to hydrogen sulfide corrosion. Its low steel grades (J55, N80) can be welded steel pipes. Oil pipe: a pipe inserted from the ground surface into the casing to the oil layer. The pipes are connected by couplings or integral connections. Its function is to transport the oil from the oil layer to the ground through the oil pipe.
